The name Kalivia comes from the word "kalyvi-ba" which is etymologized as "humble, one-story house of a room with a wooden floor. It is also pointed out that the farmers, who used to call them "Kalyviotes", lived in reed huts. It became part of the then municipality of Agrinio. Kalivia is located on the west side of Agrinio and near the river Acheloos. It is located 10 km west of the city of Agrinio and 36 km southwest of Messolonghi. The local community of Kalivia has a total area of 33,651 acres of which about 22.5 thousand acres are irrigated by TOEV (Land Reclamation Organization) Kalivia.
The new village of Kalivia was created by the inhabitants of an older settlement in a location which is located about 1 km north-northeast of the place of the old village and higher in height by about 3-4 meters. Kalivia is spread on the edge of a green plain, where from ancient times until today, people and nature coexist creatively. Citrus fruits have been cultivated in the village for more than 300 years. Mainly cultivated are oranges (Citrus sinensis), lemons (Citrus limon), mandarins.
The river Achelous begins at about 2,000 metres (6,600 ft) elevation on the eastern slope of Lakmos mountain in the Pindus range, near the village Anthousa in the westernmost part of the Trikala regional unit. One of its first tributaries is the Aspropotamos, meaning the white river.
The river flows generally southwards, and forms part of the boundary between the regional units of Arta and Trikala, which is also the boundary between Epirus and Thessaly. Further downstream, it forms the boundary of Arta and Karditsa, and further of Aetolia-Acarnania and Evrytania. The river runs into the Kremasta reservoir, which is also fed by the rivers Agrafiotis and Megdovas.
On exiting the Kremasta reservoir, the river flows southwest into Aetolia-Acarnania, feeding the Kastraki reservoir, west of the Panaitoliko range. 10 to 15 kilometres (6.2 to 9.3 mi) downstream from this lake, it flows into the Stratos reservoir. Further downstream, it runs through the lowlands west of Agrinio. It finally empties into the Ionian Sea, 29 km (18 mi) west of Missolonghi.